playing muisc while recording video

Can someone please help me? I have a blackberry Q5 and I was always able to recored a video while playing music uo until yesterday, never had a problem...now all of a sudden im not able to do that and been trying all day. A lot are saying that it was never possible but I have vids to show it worked..even when I had the Aux cable connected it worked ..just a little advice would be nice thanks